Method of and apparatus for stripping hollow articles from forms or cores



W. G LERCH. METHOD OF AND APPARATUS FOR STRIPPING HOLLOW ARTICLES FROM FORMS 0R CORES. APPLICATION FILED APR. 26, I919,

Patented Feb. II), I920.

1,330,595. 2 SHEETS-SHEY I.

In 0673 Z07- Wz'la'am Q. Z67" 07a W. G. LERCH. METHOD OF AND APPARATUS FUR STRIPPING HOLLOW ARTICLES FROM FORMS OR O0REs.'

APPLICATION FILED APR. 26, l9l9 I Patented Feb. 10, 1920.

2 SHEETS-SHEEI 2.

V UNITED sT 'rEs P TENT OFFICE.

WILLIAM GREGG Lenoir. or Anon, omo, nssmnon TO THE MILLER RUBBER comm, A coarona'rron 01? 01-110.

. mirrnon or AND APPARATUS ron s'rairrnve HOLLOW ARTICLES rnom rows or.

1 corms.

Appllflaflbli med April 26. 1919. semi No. 293,010.

T 0 all whom it may concern:

Be it known that I, WILLIAM G. Leno-H, a citizen of the United States, and resident of Akron, Ohio, have invented certain new and useful Improvements in Methods of and Apparatus for Stripping Hollow Articles from Forms or Cores, of which the following is a specification.

I resent invention relates to an improved method of and a paratus for strip pin-g or removing 'hol ow articles from forms or cores, and more particularly to the stripping of articles made from rubber solutions by the dipping therein of a suitably shaped form or core, such for example as toy balloons. I I

The invention aims to provide a simple, economical and expeditious process by which the articles may bereadily removed from the forms, without damage or injury to the articles and without the necessity of turning them inside out or rolling the material upon itself to effect the removal.

With these and other objects in view the invention includes the novel method and form ofapparatus suitable for carryin out the method as hereinafter described an defined by the appended claims.

In' order that my invention may be more readily understood, I append hereto a drawing illustrating the manner of carrying out the same, in which- Figure 1 is a perspective view of mypraferred form of apparatus.

Fig. 2 is a plan view illustrating the commencement of the removing operation.

Fig. 3 is a view illustrating a subsequent stage in the operation, and

Fig. 4 is a VlBWOf the'parts as they appear near the completion of the operation.

Referring y reference characters to this drawing the numeral 1 designates a support towhich a form is detachably connected in such a manner asto permit the, form bearing the hollow article to be readily placed thereon for stripping-the article, and quickly removed and replaced by a fresh form. A convenient .form of sup 'ort is to make the supporting member in t e form of a block having a recess 1 to receive the flanged base 2 of the form 2,su'ch recess having a narrower slot 1 in its front wall to -fit the portion or shank'of-the form immediately above the flanged base.

designed to cooperate the neck of. the balloon with In the embodiment shown the support is with the forms customarily used for making toy balloons, but when the forms are of difl'erent design the support would be modified accordingly.

The forms of toy balloons have a bulb shaped portion 2* upon which the balloon body 3 is formed, the neck 3 of the balloon extending part way down the shank. At 4 is shown a pipe adapted to be supplied with fluid .under pressure from any convenient source (not shown) such as compressed air, and thispipe is provided with a nozzle 4, preferably of flattened form, arranged in proximitv to the edge of the article on the form so as to direct a jet of air against the edge of the article.

In carrying out my im roved method I place the form bearing t e article to be stripped on the support 1 and then grasp the neck of the balloon with the thumb'and fore finger as shown in Fig. 2 and pinch or press the same so as to force a portion of the beaded edge of the neck away from the form to produce a pocket into which the jet of air penetrates from the nozzle. The air thus enteringthe pocket starts the inflation of the article by penetrating between its inner wall and the form, whereupon I release the left hand, and. grasp it in such a manner as to enable the left hand to assist the right hand in maintaining the balloon against too great inflation and cause the balloon to assume a shape for convenient stripping or removal by a longitudinal movement axially of the form, as shown in Fig. 3. This longitudinal movement is continued until the beaded portion of-the neck of the balloon contacts with the bulb portion of the form whereupon the longitudinal pull is continued and the'body of the balloon simultaneously squeezed which forces the entrapped air out between the beaded portion of-theballoon and bulb of the form, enabling the completion of the removal in a safe and easy manner, as shown in Fig. 4.

- Having thus described my invention .what I claim is I 1. The-hereindescribed method of stripping hollow flexible articleshaving relatively large bodies and forms or cores which consists in displacing a portion of the edge ofthe neck of-the arti- Patented reb io, 1920.

small necks from cle from the form, injecting a stationary jet stem when so held.

of fluid into the space so formed, and thereafter strip1t ing the article from the form.

v 2. Apparatus for removing hollow articlesliaving relatively large bodies and small necks from their forms or cores comprising a stationary support having means for detachably and interchangeably holding the forms, and a fixed pipe for compressed fluid having a jet nozzle in proximity to a portion of the form when so held.

3. Apparatus for removing toy balloons from forms having flanged shanks comprising a stationary member having an open slot to receive the stem and an enlarged portion to receive the flange, and a nozzle for directing a jet of fluid under pressure against the A. The hereindescribed method of removing toy balloons from their forms or cores, which consists in expanding the balloon by fluid pressure introduced betweenthe neck of-the balloon and the form, withdrawing the balloon until its mouth contacts with the bulb portion of the form, and simultaneously squeezing the balloon to expel entrapped air and simultaneously completing- 

